// es module
import sum from './sum'

// commonjs
var minus = require('./minus')

// AMD
require(['./muti'], function (muti) {
    console.log('muti(2, 4)', muti(2, 4))
});

console.log('sum(23, 24) = ', sum(23, 24));
console.log('minus(23, 17) = ', minus(23, 17));